package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;


@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService{

    @Autowired
    private SetmealDishService setmealDishService;

    /**
     * @Description: 鑫泽套餐，同时保存套餐和菜品的关联关系
     * @Param:
     * @return:
     * @Author: Lei
     * @Date:
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        /**保存套餐基本信息，操作Setmeal，执行insert操作*/
        this.save(setmealDto);

        /**保存套餐和菜品的关联信息，操作setmeal_dish,执行insert操作*/


        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
         setmealDishes.stream().map((item)->{
           item.setSetmealId(setmealDto.getId());
           return item;
        }).collect(Collectors.toList());


        setmealDishService.saveBatch(setmealDishes);

    }

    /**
     * @Description: 删除套餐，同时删除已经保存的套餐和菜品的关联关系
     * @Param:
     * @return:
     * @Author: Lei
     * @Date:
     */
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        /**查询套餐状态，确定是否可以删除*/
        LambdaQueryWrapper<Setmeal> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(Setmeal::getId,ids);
        lambdaQueryWrapper.eq(Setmeal::getStatus,1);
        int count = this.count(lambdaQueryWrapper);
        if (count>0) {
            /**如果不能删除，抛出一个异常*/
            throw new CustomException("套餐正在售卖中，不能删除");
        }


        /**如果可以删除，先删除套餐表中的数据---set_meal*/
        this.removeByIds(ids);

        /**删除关系表中的数据---setmeal_dish*/
        LambdaQueryWrapper<SetmealDish> lqw=new LambdaQueryWrapper<>();
        lqw.in(SetmealDish::getSetmealId,ids);

        setmealDishService.remove(lqw);


    }
}
